How to check if variable s type matches Type stored in a variable

Question

User u   new User    Type t   typeof User    u is User - gt  returns true  u is t - gt  compilation error   How do I test if some variable is of some type in this way

User · Answer

In order to check if an object is compatible with a given type variable  instead of writing  u is t   you should write  typeof t  IsInstanceOfType u

User · Answer

The other answers all contain significant omissions   The is operator does not check if the runtime type of the operand is exactly the given type  rather  it checks to see if the runtime type is compatible with the given type   class Animal    class Tiger   Animal        object x   new Tiger    bool b1   x is Tiger     true bool b2   x is Animal     true also  Every tiger is an animal    But checking for type identity with reflection checks for identity  not for compatibility  bool b5   x GetType      typeof Tiger      true bool b6   x GetType      typeof Animal      false  even though x is an animal  or with the type variable bool b7   t    typeof Tiger      true bool b8   t    typeof Animal      false  even though x is an    If that s not what you want  then you probably want IsAssignableFrom   bool b9   typeof Tiger  IsAssignableFrom x GetType        true bool b10   typeof Animal  IsAssignableFrom x GetType        true  A variable of type Animal may be assigned a Tiger   or with the type variable bool b11   t IsAssignableFrom x GetType        true bool b12   t IsAssignableFrom x GetType        true  A

User · Answer

You need to see if the Type of your instance is equal to the Type of the class   To get the type of the instance you use the GetType   method    u GetType   Equals t     or     u GetType Equals typeof User      should do it   Obviously you could use      to do your comparison if you prefer

User · Answer

GetType   exists on every single framework type  because it is defined on the base object type  So  regardless of the type itself  you can use it to return the underlying Type  So  all you need to do is   u GetType      t

[c#] How to check if variable's type matches Type stored in a variable

Examples related to c#

Examples related to reflection

Examples related to types